TFFormer: A Time-Frequency Information Fusion-Based CNN-Transformer Model for OSA Detection With Single-Lead ECG. - Chengjian Li; Zhenghao Shi; Liang Zhou; Zhijun Zhang; Chenwei Wu 007; Xiaoyong Ren; Xinhong Hei 001; Minghua Zhao; Yitong Zhang; Haiqin Liu; Zhenzhen You; Lifeng He (IEEE Trans. Instrum. Meas., 2023)